Self-diagnostic carbon nanocomposites manufactured from industrial epoxy masterbatches

Hassaan A. Butt, Stepan V. Lomov, Iskander S. Akhatov, Sergey G. Abaimov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Masterbatches of single wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs), graphene (G), reduced graphene oxide (RGO) and nitrogen doped graphene (NDG) were used at 0.5, 1.0, and 2.0 wt% to produce electrically conductive and piezoresistive nanocomposites. The conductivity and piezoresistive response was dependent on the microstructure obtained. A unified processing route incorporating mechanical mixing and ultrasonication was used. Distance between electrode points affected the final measurements and a minimum measurement distance of 2 cm was identified. Digital image correlation (DIC) was employed to measure strain during tensile loading. For all materials, an increase in the wt.% of nanoparticles resulted in lower resistivity. Resistivities for CNT samples ranged between 2 and 106 Ohm⋅cm as compared to G/RGO/NDG samples, 1011–1012 Ohm⋅cm. Strain based gauge factors for CNT samples ranged up to ~ 7 while to G/RGO/NDG masterbatches were found to be unsuitable for self-diagnostic applications.

Original languageEnglish
Article number113244
JournalComposite Structures
Volume259
DOIs
Publication statusPublished - 1 Mar 2021

Keywords

  • Carbon nanotubes
  • Graphene
  • Masterbatch
  • Nanocomposite
  • Piezoresistivity
  • Self-diagnostic

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